RT Journal Article SR Electronic T1 Fracture and aspiration of metallic tracheostomy tube JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 468 OP 468 VO 28 IS 3 A1 Asghar Hajipour A1 Zahid H. Khan YR 2007 UL http://smj.org.sa/content/28/3/468.abstract AB